Harold jabvis



H. JAHVlS.

SEL? CLUSING TAP.

Arrucnloll FILED Aumal. Inn.

1,314,195. A Patented Aug. 26, 1919.

:z He? a 1., I2 I5 ,o 14 i 9 Io Z4 25 Inventor. I6 4- UNITED STATES PATENT OFFICE.

HAROLD JARVIS, 0F TORONTO, ONTARIO, CANADA.

SELF-CLOSING TAP.

Application led August 31, 1917.

To all whom 'it may concern lic it known that I` HAROLD Janvls, a subject of the King of Great Britain, and resident of the city of Toronto, county of York Province of Ontario, in the Dominion 0 Canada, have invented certain new and useful Improvements in Self-Closing Taps, described in the following specification and illustrated in the accompanying drawings, thatl form part of the same. U

The principal object of the mvention is to eliminate the undesirable noise and detrimental vibration commonly known as water hammer in a pressure actuated self closing tap.

The. principal feature in the invention con sists in the novel construction of the valve spindle and the arrangement of the clos-ing valve whereby the passage through whic the water flows is gradua 1y cut oil' by the valve stem in the closing of the valve, the stein being formed with longitudinal grooves to allow of the passage of the water and a solid portion between said grooves and the'closing valve.

In the drawings, F1 ure 1 1s an elevational part sectional vlew o a tap constructed 1n accordance with this invention.

Fig. 2 is a perspective detail of the valve stem.

Fig. 3 is a cross sectional view through the line ae-b of Fig. 2.

Fi 4 is a cross sectional view through the line c--d of Fig. 1.

Pressure closing valves of various forms have been known for a considerable period and it is the main object of this inventionV to overcome the diliiculties met with in the use of such valves. This result has been achieved in the construction shown, in which the interior of the valve body 1 is formed with an annular shoulder 2 having the centrally arranged circular hole 3 and the valve seat 4 on the under face thereof.

The water enters the chamber 5 below the valve seat through the hole 5 indicated 1n dotted lines and flows upwardly through the hole 5 indicated in dotted lines to the hole 3 and out through a suitable nozzle or faucet (not shown) connected with the chamber (.5, the opening through the nozzle being 1nd1 cated by 6.

The cylindrical valve stem 7 is shdably arranged in the hole 3 and the upper end extends through the packing nut 8 at the top of the valve The lower end of the valve Specification of Letters Patent.

Patented Augl 2 6J 1 9 19.

Serial No. 189,062y

stem is formed with an enlarged cylindrical portion 9, upon the upper surface of which and surrounding the stein is arranged a washer 10, which washer is adapted to abut the valve seat 4 and eiiectively close the passage, the pressure holding it closed. A coil spring 11 is arranged within the chamber 5 to insure the closin of the valve. l

The valve stem 7 1s grooved as shown preferably at three sides to form a triangular shaped section 12, the lower ends 15 of the grooves being referably beveled and spaced a substantial istance above the washer 10, so that in closing, the full circular portion 14 will enter the hole 3 and cut oil' the supply before the full pressure of the water is erierted against the bottom end of the spindle to hold it closed. This arrangement for cutting oil' the flow eliminates the hammering eil'ect which takes place in the present forms of self closing taps. The valve stem 7 is operated to open the valve by means of the lever 16 engaging the top thereof, said lever bein ivotally secured to the lug projection 17 o t e cap member 18 secured to the upper part of the valve body 1.v

The member 18 is preferably provided with an upwardly projecting 1u 19 which is slotted vertically to receive t e lever 16 and a pin 20 extends across the top of the slot to secure the lever from being turned over. A fixed arm 21 forms part of the member 18 and the lever 16 is provided with a lug 22 adapted to engage the arm member 21 to prevent the lever being sprung.

The upper face ofthe lever 16 is formed with a longitudinal slot 23, which is preferably undercut as shown in Fig. 4 and 1n this Slot is arranged a sliding block 24 which block is formed with a plurality of steps. These steps are adapted to engage the pin 20 so as to hold the tap open if it i s desired to have the water running for any special purpose. This block arrangement may be dispensed with if desired, without in any way interfering with the operation of the.

tap.

In thepoperation of this tap, upon the .squeezing of the lever 16 and arm 21 toliu into communication with the pressure chambci- 5 and the water then flows free] through the hole 3 around the stein. Thls flow continues as long as the lever 16 is held down, but immediately upon its release the pressure of the spring 11 and the pressure of the water a ainst'the underside of the valve, moves t e valve spindle upwardly. Ordinaril when this action occurs the pressure of t ie water closes the valve with a snap and a hammer results but by arranging the grooves in the spindle in the manner described the How is adually cut 0H and the action of the splndle is thus retarded.

A tap constructed as described has bee very satisfactorily tested under various pressures and it is found to be absolutely free from noise.

lVhat Iclaim as my invention is:-

1. A self closing tap comprising a valve body having a central chamber open at the top and rovided with a valve seat arran d between lnfiow and outflow o enings, a va ve stem arranged in said cham er and extending tliereabove and having a valve at its lower end for closing against the valve seat, a cap closing the top of said chamber and encircling said valve stem and having a rigid arm extending therefrom, a packing nut secured to said cap and encircling said stem., a lever pivotally supported from said cap and extending over and engaging the top o f the valve stem and arranged above sa1d arm, and means for uidin and su porting said lever intermediate o its lengtli.

2. In a self-closing valve, a body portion open at the top and having a valve scat, a grooved valve stem extending through said valve seat and having a valve at the inner end adapted to be pressure closed against said seat, a cap secured to the top of said body portion, an arm extending upwardly from said ca a lever pivotall secured to the upper en of said arm an adapted to enage the upper end of said valve stem. a s otted lug pro1ecting upwardly from said cap on the s1de opposite to the lever slipp or t1 ng arm, said lug formin a guide for llmitlng the movement of said lever, and a rigid arm.projecting :from said cap and arranged below said lever.

3. In a self-closin valve, a pressure closed valve, a lever pivote. ly supported from the Valve body for opening the valve, a slotted arm. extending each side of said lever and havin a cross bar at the to and a member slldably arran ed on sai lever adapted to engage the un ersde of said cross bar for holding the valve open.

HAROLD JARVIS. 

